Do you have a link to a paper? On Sep 28, 2014 10:45 AM, "Fred" <f.hartho...@ziggo.nl> wrote:
> Hi Campbell Barton, > > The amount of interpolation dots is 2^i, at the start of the demo i = > 4 (16 dots) > if you change i = 7 (the limit in the demo) than there are 128 > interpolation dots. > > if I had set the limit in the demo to 10 then 1024 interpolation dots > was possible. > > If the spline is used in a 3 dimensional space, > to compute an interpolated dot position takes: dim * 10 clock cycles = > 30 clock cycles. > I hope that it is fast enough. > > If you like to have a curve to the last plotted dot you have to put two > dots on each other at the end. > You will see that it is symmetrical again. > > Please change the number to 7 in the demo and you see a curved line in > stead of dots. > > Much more is possible with this spline because the first, second and > third derivative (parameterized ) of the curve > is available in real time. > > I think that much more can be invented with this spline technique. > I think that with some research tangent handles can be constructed as > well (if you like them?). > What I did in the demo was the most simple way of using it. > > The essence is: a 3th degree curve in two (x,y) or more directions is > differentiated three times, and then again integrated 3 times. > With floating point this is impossible , because it is not exact, the > curve runs away. > But with integer computing it is exact and the spline exact a 3th degree > curve. > > It can also be used in ten or more directions, but more then 3 > dimensions (x,y,z) is not practical. > > Fred. > -------------------------------------- > Fred schreef op 28-9-2014 om 18:30: > > That is in the demo the case, because I programmed that the first plot > > point is actually two points. > > the spline uses 4 points p0, p1, p2, p3 and the interpolation is > > between p1 and p2. > > > > Campbell Barton schreef op 28-9-2014 om 17:42: > >> Checked the test application, and not sure if this is intended but a > >> simple triangle has uneven distribution. > >> > >> see: http://www.graphicall.org/ftp/ideasman42/fred_curve.png > >> > >> On Mon, Sep 29, 2014 at 1:32 AM, Dan McGrath <danmcgrath...@gmail.com> > wrote: > >>> Cool, got them. Will take a look later. o/ > >>> > >>> Dan > >>> > >>> On Sun, Sep 28, 2014 at 11:28 AM, Fred <f.hartho...@ziggo.nl> wrote: > >>> > >>>> Ok, It is uploaded to the directory incoming > >>>> > >>>> Dan schreef op 28-9-2014 om 17:15: > >>>>> You could always upload it to our anonymous ftp via > download.blender.org > >>>>> (or ftp.blender.org) and put it into the incoming directory (use > passive > >>>>> mode). From there was can fetch the files via > >>>>> http://download.blender.org/ftp/incoming/ > >>>>> > >>>>> Dan > >>>>> > >>>>> On Sun, Sep 28, 2014 at 11:05 AM, Fred <f.hartho...@ziggo.nl> wrote: > >>>>> > >>>>>> Campbell Barton > >>>>>> > >>>>>> I have tried to send it but it is rejected. So send me an addres for > >>>>>> upload. > >>>>>> > >>>>>> fred > >>>>>> > >>>>>> > >>>>>> Campbell Barton schreef op 28-9-2014 om 16:51: > >>>>>>> Could the project files be posted to a public URL?, Id like to be > able > >>>>>>> to look into this. but probably wont have time over the coming > weeks. > >>>>>>> > >>>>>>> The main source file compiles for me with minor edits on > >>>>>>> Linux/FreePascal, but the demo relies on `Window` unit, which I > assume > >>>>>>> is provided by delphi/windows. > >>>>>>> > >>>>>>> On Mon, Sep 29, 2014 at 12:36 AM, Dan McGrath < > danmcgrath...@gmail.com > >>>>>> wrote: > >>>>>>>> Hey, > >>>>>>>> > >>>>>>>> Just save out the delphi project and zip it up and email it to me > >>>> direct > >>>>>>>> via email I guess (the mailing list wouldn't allow such a large > >>>>>>>> attachement). I was attempting to compile it on linux, so the > compiled > >>>>>>>> dll's wouldn't be of much use to me unfortunately. > >>>>>>>> > >>>>>>>> Thanks! > >>>>>>>> > >>>>>>>> > >>>>>>>> Dan > >>>>>>>> > >>>>>>>> On Sun, Sep 28, 2014 at 10:06 AM, Fred <f.hartho...@ziggo.nl> > wrote: > >>>>>>>> > >>>>>>>>> Hi Dan, > >>>>>>>>> > >>>>>>>>> Of course I can send you the project. > >>>>>>>>> I have made two versions: > >>>>>>>>> 1) The spline is embedded in de demo: > >>>>>>>>> 2) The spline is an external .dll, de demo calls PSpline.dll > >>>>>>>>> > >>>>>>>>> Which one do you prefer? > >>>>>>>>> > >>>>>>>>> Fred. > >>>>>>>>> ---------------- > >>>>>>>>> > >>>>>>>>> > >>>>>>>>> > >>>>>>>>> Dan McGrath schreef op 28-9-2014 om 15:42: > >>>>>>>>>> So is/was Turbo Pascal (limited in features; eg: objects but no > >>>>>> classes) > >>>>>>>>>> and FreePascal+Lazarus (supports almost everything Delphi does > >>>> still? > >>>>>>>>>> http://wiki.freepascal.org/Lazarus_For_Delphi_Users). > >>>>>>>>>> > >>>>>>>>>> Anyway, just thought it was neat to see code in pascal (an > elegant > >>>>>>>>>> language, imho). Curious though, why not just give the whole > delphi > >>>>>>>>> project > >>>>>>>>>> and resource files so your forms can be built etc.? The code > seems > >>>> to > >>>>>>>>>> compile with some modifications here, but without the {$R *.DFM} > >>>>>> (*.lfm > >>>>>>>>> in > >>>>>>>>>> fp), one would have to manually rebuild the form :( > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> On Sun, Sep 28, 2014 at 8:55 AM, Fred <f.hartho...@ziggo.nl> > wrote: > >>>>>>>>>> > >>>>>>>>>>> It's true, but Delphi is object oriented. > >>>>>>>>>>> > >>>>>>>>>>> Dan McGrath schreef op 28-9-2014 om 14:53: > >>>>>>>>>>>> Standard Pascal, Turbo Pascal, Freepascal, Delphi; same > language, > >>>>>>>>>>> different > >>>>>>>>>>>> dialect :) > >>>>>>>>>>>> > >>>>>>>>>>>> On Sun, Sep 28, 2014 at 8:43 AM, Fred <f.hartho...@ziggo.nl> > >>>> wrote: > >>>>>>>>>>>>> Actually it is Delphi > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> Dan McGrath schreef op 28-9-2014 om 14:35: > >>>>>>>>>>>>>> Pascal, with inline assembler to boot! \o/ :) > >>>>>>>>>>>>>> > >>>>>>>>>>>>>> On Sun, Sep 28, 2014 at 6:46 AM, Ton Roosendaal < > >>>> t...@blender.org> > >>>>>>>>>>> wrote: > >>>>>>>>>>>>>>> Hi, > >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> Fred told me he's not interested in getting involved, or > >>>> setting > >>>>>> up > >>>>>>>>> a > >>>>>>>>>>>>>>> project for his work. > >>>>>>>>>>>>>>> He's retired now and just thought we might be interested > in a > >>>>>>>>> research > >>>>>>>>>>>>>>> topic he did. > >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> I've copied files he sent to me here; > >>>>>>>>>>>>>>> http://download.blender.org/ftp/ton/ > >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> It's a Dutch pdf and two pascal files. > >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> -Ton- > >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> -------------------------------------------------------- > >>>>>>>>>>>>>>> Ton Roosendaal - t...@blender.org - www.blender.org > >>>>>>>>>>>>>>> Chairman Blender Foundation - Producer Blender Institute > >>>>>>>>>>>>>>> Entrepotdok 57A - 1018AD Amsterdam - The Netherlands > >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> On 28 Sep, 2014, at 9:28, Aditia A. Pratama wrote: > >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>>> HI Fred, > >>>>>>>>>>>>>>>> > >>>>>>>>>>>>>>>> Can you record a screencast/video demo to show how it > works? > >>>>>>>>>>>>>>>> > >>>>>>>>>>>>>>>> Regards, > >>>>>>>>>>>>>>>> On Sep 28, 2014 2:14 PM, "Fred" <f.hartho...@ziggo.nl> > wrote: > >>>>>>>>>>>>>>>> > >>>>>>>>>>>>>>>>> I forgot to say, I have a two dimensional demo but it is > >>>>>> working > >>>>>>>>> on > >>>>>>>>>>> a > >>>>>>>>>>>>>>>>> windows computer. > >>>>>>>>>>>>>>>>> > >>>>>>>>>>>>>>>>> Jacob Merrill schreef op 28-9-2014 om 02:07: > >>>>>>>>>>>>>>>>>> would this make it so you can record F-curves over time > >>>>>> better? > >>>>>>>>>>>>>>>>>> right now recording in the engine gets slower the > longer it > >>>>>> runs, > >>>>>>>>>>>>>>>>>> _______________________________________________ > >>>>>>>>>>>>>>>>>> Bf-committers mailing list > >>>>>>>>>>>>>>>>>> Bf-committers@blender.org > >>>>>>>>>>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>>>>>>>>>>>>>>> > >>>>>>>>>>>>>>>>> _______________________________________________ > >>>>>>>>>>>>>>>>> Bf-committers mailing list > >>>>>>>>>>>>>>>>> Bf-committers@blender.org > >>>>>>>>>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>>>>>>>>>>>>>> > >>>>>>>>>>>>>>>> _______________________________________________ > >>>>>>>>>>>>>>>> Bf-committers mailing list > >>>>>>>>>>>>>>>> Bf-committers@blender.org > >>>>>>>>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>>>>>>>>>>>> _______________________________________________ > >>>>>>>>>>>>>>> Bf-committers mailing list > >>>>>>>>>>>>>>> Bf-committers@blender.org > >>>>>>>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>>>>>>>>>>>> > >>>>>>>>>>>>>> _______________________________________________ > >>>>>>>>>>>>>> Bf-committers mailing list > >>>>>>>>>>>>>> Bf-committers@blender.org > >>>>>>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>>>>>>>>>>> > >>>>>>>>>>>>> _______________________________________________ > >>>>>>>>>>>>> Bf-committers mailing list > >>>>>>>>>>>>> Bf-committers@blender.org > >>>>>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>>>>>>>>>> > >>>>>>>>>>>> _______________________________________________ > >>>>>>>>>>>> Bf-committers mailing list > >>>>>>>>>>>> Bf-committers@blender.org > >>>>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>>>>>>>>> > >>>>>>>>>>> _______________________________________________ > >>>>>>>>>>> Bf-committers mailing list > >>>>>>>>>>> Bf-committers@blender.org > >>>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>>>>>>>> > >>>>>>>>>> _______________________________________________ > >>>>>>>>>> Bf-committers mailing list > >>>>>>>>>> Bf-committers@blender.org > >>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>>>>>>> > >>>>>>>>> _______________________________________________ > >>>>>>>>> Bf-committers mailing list > >>>>>>>>> Bf-committers@blender.org > >>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>>>>>> > >>>>>>>> _______________________________________________ > >>>>>>>> Bf-committers mailing list > >>>>>>>> Bf-committers@blender.org > >>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>>> _______________________________________________ > >>>>>> Bf-committers mailing list > >>>>>> Bf-committers@blender.org > >>>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>>> > >>>>> _______________________________________________ > >>>>> Bf-committers mailing list > >>>>> Bf-committers@blender.org > >>>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>>> > >>>> _______________________________________________ > >>>> Bf-committers mailing list > >>>> Bf-committers@blender.org > >>>> http://lists.blender.org/mailman/listinfo/bf-committers > >>>> > >>> _______________________________________________ > >>> Bf-committers mailing list > >>> Bf-committers@blender.org > >>> http://lists.blender.org/mailman/listinfo/bf-committers > >> > > _______________________________________________ > > Bf-committers mailing list > > Bf-committers@blender.org > > http://lists.blender.org/mailman/listinfo/bf-committers > > > > _______________________________________________ > Bf-committers mailing list > Bf-committers@blender.org > http://lists.blender.org/mailman/listinfo/bf-committers > _______________________________________________ Bf-committers mailing list Bf-committers@blender.org http://lists.blender.org/mailman/listinfo/bf-committers